When comparing StackEdit vs Quip, the Slant community recommends Quip for most people. In the question“What is the best cross-platform note-taking app?” Quip is ranked 19th while StackEdit is ranked 28th. The most important reason people chose Quip is:
Quip allows for offline editing of documents which then sync upon connection to Wi-Fi. This way users can continuing working while not connected to a data signal, but they can still back up their work when they do finally get one.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works online and offline
StackEdit works within your browser. You need internet access to connect to the website, but once it's loaded, the site does not require an internet connection - you will be able to edit and save files locally. Additionally, you can use Fluid to turn it into a native desktop application.
Pro Supports various Markdown flavors
Supports standard Markdown and Markdown Extra.

Pro Simple workflow
It is very easy to toggle between the preview and the editing windows. The black makes it a very focused writing environment. Of course it's possible to change that if needed.

Pro Great when in full-screen
Pro No need to install additional software
StackEdit works directly from the browser, there's no need to install additional software as long as you have a web browser installed on your computer.
Pro Real-time preview
The preview shows in a collapsible pane on the right hand side.
Pro Instant publishing
StackEdit allows pushing a document directly to a list of publishing or file storage platforms or any SSH server.
Pro Multiple export options
Can export to .txt, .html and .pdf.
Pro Syncs via Dropbox and Drive
Files can be synchronized through Dropbox and Drive.
Pro Offline editing
Quip allows for offline editing of documents which then sync upon connection to Wi-Fi. This way users can continuing working while not connected to a data signal, but they can still back up their work when they do finally get one.
Pro Amazing mobile interface
Unlike other mobile apps, Quip has really innovated the text editor on mobile, making for a good Evernote alternative. It has a great interface for formatting text that stays out of your road so to maximize how much room you have to type.
Pro Private document sharing
Files can be shared with others via a URL. The owner of the shared document can set it to be in read-only mode or they can allow anyone to edit it. Collaborators don't need to have a Quip account to participate. This feature makes for a great Evernote alternative, for those looking for a different app that has this similar function.
Pro Highly compatible
Quip can export documents to several formats, including .DOC, .PDF, .HTML, as well as a couple of others. This allows for compatibility with a wide selection of other apps.
Cons
Con Saves files in browser's local storage
Local storage is limited and if the browser crashes the text can be lost.
Con Cannot be accessed while being offline
Even though the editor itself works offline, you need internet access to open the website and the editor.
Con Lacks a good integrated spell checker
Uses the built-in browser spell checker which may not be as good as spell checkers other editors have. Depending on the browser, of course.
Con Publishing to GitHub requires giving write access to repos
In order to publish documents to GitHub, StackEdit requires writing access to your repos, something which many people may not be comfortable with.
Con New version has performance issues
…on my old phone. Yes I know my phone is at fault but the old version wasn't annoyingly slow in the Spreadsheet component.
Con Not really free with stringent controls on trial
The trial is content limited which means if you start using it quite a bit they'll pick the perfect moment to swoop in and start charging you. It's better for them because it means they can look at your account and pick the best time to ask you to pay (hey we notice you're using Quip lots and have a new project you just started how about you pay now or you lose everything).
Con Limited formatting on spreadsheets
Within spreadsheet cells, you can't do things like, for example, taking part of the text and aligning it to the center or to the left. Furthermore, in the mobile app, you can't jump to the next line to keep writing inside the same cell.
Con Can't rename files
You can't really rename documents per se in Quip. What you do is put the first line of the document as its title, so that it is displayed on the main list of documents on the app. The program suggests to combine it with a HL (Large Heading) format.
